Veneer-saw



(No Model.)

A. E. HOFFMAN.

VEN-BER SAW. No. 480,428. Patented Aug. 9, 1892.

UNITED STATES PATENT OFFICE.

ANDREW E. HOFFMAN, OF FORT \VAYNE, INDIANA.

VENEER-SAW.

SPECIFICATION forming part of Letters Patent No. 480,428, dated. August9, 1892.

Application filed August 3, 1891.

To all whmn it may concern.-

Be it known that I, ANDREW E. HOFFMAN, acitizen of the United States,residing at Fort Wayne, in the county of Allen and State of Indiana,have invented certain new and useful Improvements in Veneer-Saws, ofwhich the following is a full, clear, and exact description, that willenable others to make and use the same, reference being had to theaccompanying drawings, forming a part of this specification, in whichFigure 1 is a side elevation; Fig. 2, a transverse section on line 2,Fig.1; Fig. 3, a view in perspective of a dowel-pin or key, and Fig. 4 abroken-away detail.

This invention relates to improvements in that class of circular sawsthat are used in the production of very thin lumber, such as veneers andthe like. The present method of mounting and supporting makes itimpractical to remove the segments for the purpose of dressing. Insawing veneers the saw must be absolutely in line and a perfect balancemaintained in every respect or the saw will lead and the product beruined.

The cutting-edge of a veneer-saw is necessarily of a much thinner gagethan is ordinarily used and requires more careful handling.

The object, therefore, of this improvement is to provide an arrangementto obviate some or all of the objections attending the operating of thisclass of mechanism.

Referring to the drawings, A represents the saw, which consists of anumber of segmentplates a, secured at their inner edges to the ring orcollar 0 by means of the screws a. That portion of the ring 0 overlappedby the inner edge of the saw is cut away or recessed to a depthcorresponding to the thickness of the saw-plate, as at a so that theline or log side 0. presents a straight face.

It will be observed that the ring 0, to which the saw-plates aresecured, is divided on the line a into two semicircular or equal parts.This line of separation corresponds, as shown, to the meeting edges ofthe companion sectional saw-plates, which feature provides for theremoval of the saw and ring from its mounting in two or more parts. Adisk-wheel or solid collar D is rigidly mounted on the driving shaft orarbor E. This disk presents Serial No. 401,536. (No model.)

a straight face on the line or log side and a spherical surface Z) onthe opposite side, as shown in Fig. 2. This disk is cut away or recessedsome distance inwardly from its periphery to provide the annularshoulder 12, forming a bearing for the meeting inner edge of thesectional saw-holding ring. The periphery or edge of the diskD isbeveled or cut away on the line 17 Fig.-.2, which is at an oblique anglewith reference to the axis of rotation. This forms an annular V-point d,which fits into the corresponding groove or recess d in the back of thesaw-ring, as shown in Fig. 2. This form of construction provides a largebearing for the j oining or meeting surfaces of the sectionalringad-dlthe supportingdisk, and by reason of the V'point and correjsponding groove these parts always draw or wedge together on a true lineand keep the saw in proper balance no matterhow often the same,with itsattaching-ring, may be removed, replaced, or changed.

face of the saw-collar and supporting-disk must be dressed and fitted toa nicety.

The saw-collar is removably secured to its supporting disk by means of anumber of screws (:1 A number of double dovetail pins F, Fig, 3, mayalso be used to more firmly lock the meeting ends of the sectionalsawring and the disk-wheel together, as shown in Fig. 1.

The meeting or joining ends of the sections comprising the saw-carryingring are each pro: vided with the common recess g, into which fits thedovetail end 9' of the locking pin or key. The head end of this pin orpins is provided with the elongated slot g through which the set-screw gis inserted and seated in the disk-wheel. In this manner the pins orkeys are adjustably locked in place.

The ordinary construction of a veneer-saw consists generally infastening the series of segment-plates to the rim of a suitable wheelrigidly mounted on its shaft. The saw is then usually dressed in itsworking position and of course remains idle during the operation, thuslosing much valuable time.

The saw is often located where there is not sufficient light to see howto properly dress the same. Now under the arrangement herein set forththe saw-holding collar may be It will of course be understood that themeeting or bearing sur- 7 divided into any required number of sections,two or more, (two being used by way of illustration,) in accordance withthe weight of the mounting and diameter of the saw. The sectional ringtowhich the saw-plates are secured forms an intermediate element betweenthe saw and the disk on the driving-shaft. Therefore the saw-ring can bequickly and conveniently removed in sections, each section having anumber of saw-plates attached, and taken to the filing room to beproperly dressed. The saw removed is then replaced by a newly-sharpenedone and but little time is lost. The saw-ring sections are of courseinterchangeable, and any one can be substituted for another. In theprocess of dressing it will not be necessary, ordinarily, to remove thesaw-plates from the different ringsections. There being no wear on thejoining surfaces of the saw-ring and disk-wheel, the parts being once inline and properly balanc d ill remain so. It is also often necessary insawing veneers to use saws of different thicknesses having a greater orless set, in accordance with the requirements of the diiferent kinds ofwood.

In sawing-fespecially oak--great care must be taken to prevent thesaw-filings from coming in contact with the veneer, as it leaves a stainor discolors the wood, damaging and lessening its value. By having thefiling done in a separate room the particles of steel cannot come incontact with the wood.

There are many other advantages in the peculiar construction andarrangement that will be so apparent to those skilled in the art thatthey need not be herein set forth.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a veneer-saw, the combination of a saw consisting of a number ofsegment-plates,

a ring or'collar divided into anumber of segmental sections, a number ofthe saw-plates removably attached to each ring-section, saidring-sections being cut away on the face side to a depth correspondingto the thickness of the saw-plates, and the fastening-screws securingsaid plates to said ring, whereby the saw may be separated into as manyparts as there are ring-sections without detaching the segmental plates,substantially as set forth.

2. In a veneer-saw, the combination of a saw consisting of anumber ofsegment-plates, a supporting-ring provided with a groove or recess anddivided into a number of segmental sections, a number of the saw-platesbeing removably attached to each ring-section, and a solid disk-collarhavinga beveled edge adapted to engage with said groove or recess in thesupporting-ring, and the driving-shaft upon which said disk-collar isrigidly mounted, substantially as set forth.

3. In a veneer-saw, the combination of a saw-ring constructed in two ormore sections and cut away on its rear side to form a V- groove and adisk-wheel correspondinglycut away on its meeting surface to provide ashoulder-bearing for said ring-sections and having its edge beveled toform a V-point to fit into said groove, substantially as set forth.

4. In a veneer-saw, the combination of the saw-ring constructed insections and provided in its meeting ends with dovetailed recesses, thedisk-wheel, the double dovetail pins or keys set into said disk andadapted to engage with said recesses, and the fastening-screws insertedthrough said ring-sections into said disk, substantially as set forth.

ANDREIV E. HOFFMAN.

Witnesses E. G. SHULZE, WV. J. ECKELS.

